CN102427211A - EMTDC (Electro Magnetic Transient in DC System) modeling method with dipolar DC (Direct Current) power incongruous transmission ice melting function - Google Patents
EMTDC (Electro Magnetic Transient in DC System) modeling method with dipolar DC (Direct Current) power incongruous transmission ice melting function Download PDFInfo
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- CN102427211A CN102427211A CN2011103068553A CN201110306855A CN102427211A CN 102427211 A CN102427211 A CN 102427211A CN 2011103068553 A CN2011103068553 A CN 2011103068553A CN 201110306855 A CN201110306855 A CN 201110306855A CN 102427211 A CN102427211 A CN 102427211A
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Abstract
The invention discloses an EMTDC (Electro Magnetic Transient in DC System) modeling method with a dipolar DC (Direct Current) power incongruous transmission ice melting function. The EMTDC modeling method comprises the following steps of: additionally arranging an ice melting function selective switch on a control panel; additionally arranging an ice melting direction selective switch on the control panel; distinguishing power direction related logic of two DC poles into a pole I DC power direction and a pole II DC power direction, wherein all power direction relative variables are distinguished into two parts, namely a pole I and a pole II; and forcedly running DC in a constant DC control mode under a DC ice melting mode in EMTDC simulation software. The EMTDC modeling method with the dipolar DC power incongruous transmission ice melting function, disclosed by the invention, can be realized by only modifying the model in the EMTDC simulation software without changing the structure of the traditional bipolar DC power transmission system, thus the research requirements on running characteristics of DC in the bipolar DC power incongruous transmission ice melting mode can be met.
Description
Technical field
The present invention relates to a kind of EMTDC modeling method of bipolar DC power guiding transmission deicing function.
Background technology
The dynamic characteristic of high voltage direct current transmission project direct current system under bipolar DC power guiding transmission deicing pattern and two ends current conversion station reactive power consumption and harmonic characterisitic are the key factors that influences the direct current system safe and stable operation, and the insider is very few to the research of these aspects at present.
For ease of the operation dynamic characteristic of direct current system and the reactive power consumption and the alternating current-direct current side harmonic characterisitic of two ends current conversion station under the research bipolar DC power guiding transmission deicing pattern; Need set up the incorgruous Propagation Simulation model of bipolar DC power analyzes and researches; Its result of study is that operation characteristic and filter configuration, the bank of filters switching of direct current system under ice-melting mode provides the certain theory basis, and the actual dc engineering is had great importance at the safe and stable operation under the ice-melt mode.
South electric network EMTDC DC Model has only bipolar DC power transfer function in the same way at present; There is not bipolar DC power guiding transmission deicing function; The operation characteristic of direct current when the EMTDC DC Model can only the researching DC bipolar power be transmitted in the same way can not be studied the operation characteristic of direct current under the bipolar DC power guiding transmission deicing pattern.
Therefore, existing EMTDC DC Model await to improve, perfect.
Summary of the invention
The object of the present invention is to provide a kind of EMTDC modeling method of bipolar DC power guiding transmission deicing function; Be intended to solve the operation characteristic of south electric network EMTDC DC Model direct current when can only the researching DC bipolar power transmitting in the same way, can not study the problem of the operation characteristic of direct current under the bipolar DC power guiding transmission deicing pattern.
Technical scheme of the present invention is following:
A kind of EMTDC modeling method of bipolar DC power guiding transmission deicing function wherein, comprising: on control panel, increase " ice-melt " functional select switch; On control panel, increase " ice-melt direction " selector switch; The power direction interrelated logic of DC bipolar is divided into the utmost point 1 direct current power direction and the utmost point 2 direct current power directions; All power direction correlated variabless are all divided into the utmost point 1 and the utmost point 2 two parts, and the operation method of the EMTDC model of bipolar DC power guiding transmission deicing function is:
Steps A: select the EMTDC DC Model to run on ice-melt mode and ice-melt direction thereof;
Step B: force DC operation under the DC ice melting pattern in deciding the direct current control model;
Step C: ice-melt direct current definite value is set;
Step D: ice-melt direct voltage definite value is set;
Step e: the release utmost point 1 and the utmost point 2 operation guiding transmission deicing functions.
The EMTDC modeling method of described bipolar DC power guiding transmission deicing function, wherein, said ice-melt direct current definite value is 1.1p.u or 1.2p.u.
The EMTDC modeling method of described bipolar DC power guiding transmission deicing function, wherein, said ice-melt direct voltage definite value is 0.7p.u or 0.8p.u.
Beneficial effect of the present invention: the present invention provides a kind of EMTDC modeling method of bipolar DC power guiding transmission deicing function; The present invention need not existing bipolar DC EMTDC structure of models is changed; Only needing in the EMTDC simulation software, to revise model can realize, satisfies the Study on Operating Performance requirement to direct current under the bipolar DC power guiding transmission deicing pattern.
Description of drawings
Fig. 1 is the sectional drawing that ice-melt mode is selected in the EMTDC model of the present invention;
Fig. 2 is the sectional drawing of bipolar power direction in the EMTDC model of the present invention;
Fig. 3 is the sectional drawing of direct current reference value in the EMTDC model of the present invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, clear and definite, below develop simultaneously embodiment to further explain of the present invention with reference to accompanying drawing.
Present existing EMTDC DC Model has only " bipolar DC power transmits normal mode in the same way ", does not have " bipolar DC power guiding transmission deicing pattern ", and the present invention improves on the basis of former EMTDC DC Model, makes it increase the ice-melt function.
The EMTDC modeling method of bipolar DC power guiding transmission deicing function provided by the invention specifically may further comprise the steps:
Steps A: select the EMTDC DC Model to run on ice-melt mode and ice-melt direction thereof;
Step B: force DC operation under the DC ice melting pattern in deciding the direct current control model;
Step C: ice-melt direct current definite value is set;
Step D: ice-melt direct voltage definite value is set;
Step e: the bipolar moving model of release.
The present invention is through realizing bipolar power guiding transmission deicing function in the EMTDC DC Model; In the EMTDC DC Model, select ice-melt mode; Select to decide current mode of operation, it is Id=1.1p.u or Id=1.2p.u that ice-melt direct current definite value is set, and it is Ud=0.7p.u or Ud=0.8p.u that ice-melt direct voltage definite value is set; Release bipolar (utmost point 1 direct current power direction and the utmost point 2 direct current power directions), operation bipolar power guiding transmission deicing model.
In conjunction with the committed step of the explanation of the simulation model sectional drawing in present embodiment bipolar power guiding transmission deicing function operation, key step comprises:
At first on control panel, increase " ice-melt " functional select switch.The user can select the EMTDC DC Model to run on still " ice-melt " pattern of " normally " pattern, shown in " A " among Fig. 1, and " Nor " expression normal mode among the Operation Mode, " D_ICE " representes ice-melt mode.
Then, on control panel, increase " ice-melt direction " selector switch.The user can select still " reverse ice-melt " pattern of " forward ice-melt " pattern, and shown in " B " among Fig. 1, " REV " among the De-ice Direction representes reverse ice-melt mode, " FOR " expression forward ice-melt mode.
In order to realize that the EMTDC model running is in " forward ice-melt " pattern or " reverse ice-melt " pattern; Need the power direction interrelated logic of DC bipolar be divided into " utmost point 1 direct current power direction " and " utmost point 2 direct current power directions "; All " power direction " correlated variabless are all divided into the utmost point 1 and the utmost point 2 two parts, shown in " C " among Fig. 2.
Because DC operation is in deciding current control mode under the actual dc engineering ice-melt mode; So force DC operation under the DC ice melting pattern in the EMTDC simulation software in deciding the direct current control model; Shown in " D " among Fig. 3, " Pmode " expression DC operation is in " deciding the direct current power pattern "; " Imode " expression DC operation is in " deciding the direct current pattern ".
The present invention only needs in the EMTDC simulation software, to revise original EMTDC DC bipolar direct current power mode in the same way; Need not change existing bipolar DC EMTDC model structure; Can realize Study on Operating Performance to direct current under the bipolar DC power guiding transmission deicing pattern; This method is simple to operate, is easy to realize.
Should be understood that application of the present invention is not limited to above-mentioned giving an example, concerning those of ordinary skills, can improve or conversion that all these improvement and conversion all should belong to the protection range of accompanying claims of the present invention according to above-mentioned explanation.
Claims (3)
1. the EMTDC modeling method of a bipolar DC power guiding transmission deicing function is characterized in that, comprising: on control panel, increase " ice-melt " functional select switch; On control panel, increase " ice-melt direction " selector switch; The power direction interrelated logic of DC bipolar is divided into the utmost point 1 direct current power direction and the utmost point 2 direct current power directions; All power direction correlated variabless are all divided into the utmost point 1 and the utmost point 2 two parts, and the operation method of the EMTDC model of bipolar DC power guiding transmission deicing function is:
Steps A: select the EMTDC DC Model to run on ice-melt mode and ice-melt direction thereof;
Step B: force DC operation under the DC ice melting pattern in deciding the direct current control model;
Step C: ice-melt direct current definite value is set;
Step D: ice-melt direct voltage definite value is set;
Step e: the release utmost point 1 and the utmost point 2 operation guiding transmission deicing functions.
2. the EMTDC modeling method of bipolar DC power guiding transmission deicing function according to claim 1 is characterized in that, said ice-melt direct current definite value is 1.1p.u or 1.2p.u.
3. the EMTDC modeling method of bipolar DC power guiding transmission deicing function according to claim 1 is characterized in that, said ice-melt direct voltage definite value is 0.7p.u or 0.8p.u.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103068553A CN102427211A (en) | 2011-10-11 | 2011-10-11 | EMTDC (Electro Magnetic Transient in DC System) modeling method with dipolar DC (Direct Current) power incongruous transmission ice melting function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103068553A CN102427211A (en) | 2011-10-11 | 2011-10-11 | EMTDC (Electro Magnetic Transient in DC System) modeling method with dipolar DC (Direct Current) power incongruous transmission ice melting function |
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| CN102427211A true CN102427211A (en) | 2012-04-25 |
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| CN2011103068553A Pending CN102427211A (en) | 2011-10-11 | 2011-10-11 | EMTDC (Electro Magnetic Transient in DC System) modeling method with dipolar DC (Direct Current) power incongruous transmission ice melting function |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325323A (en) * | 2008-04-09 | 2008-12-17 | 国网直流工程建设有限公司 | DC power guiding transmission deicing operation method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325323A (en) * | 2008-04-09 | 2008-12-17 | 国网直流工程建设有限公司 | DC power guiding transmission deicing operation method |
Non-Patent Citations (3)
| Title |
|---|
| 《安徽电力》 20110930 冯鸫等 天广直流输电系统融冰功能仿真研究 第40-46页 2-3 , 第03期 * |
| 冯鸫等: "天广直流输电系统融冰功能仿真研究", 《安徽电力》 * |
| 谢惠藩等: "高肇直流融冰运行模式下无功功率和谐波特性分析", 《电力系统自动化》 * |
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Application publication date: 20120425 |